Stuffing-box.



J. HAHN. STUPHNG BOX.

APPLICATION FILED NOV. 7, 1910.

Patented Mar; 21, 1911.

M 5|: u 1 n 4.l w. n I V/ x llllillll a stuiiing box by means of whichthe UNITED STATES PATENT OFFICE.

JOHN HAHN, 0F LOS ANGELES, CALIFORNIA.

STUFFING-BOX.

Specification of Letters Patent.

Patented Mar. 21, 1911.

Continuation of application Serial No. 568,033, filed June 20, 19140.This application led November 7, 1910. Serial .'No. 591,190.

4To all whom it may concern:

Be it known that I, JOHN ,Hanru a citizen of the United States, residingat Los Angeles,in the county of Los Angeles and State of California,have invented .a new and useful Stuliing-Box, of which the following isa specification.

','in various forms to prevent leakage between relatively moving parts,of many kinds.

An object of this invention is'to provide packing to close the joint canbe adjusted to any degree of tightness; and also to make' provisionwhereby a chamber for 'oil or other cooling medium is formed around thepack-l ing as is desirable `for shafts, engine pistons and cylinders.

Cheapness, simplicity, ease of adjustment and freedom from becominglooseare other ob]ects .1n view.

Further objects and advantages'mayf-p pear from the subjoined detaildescription.

The invention is applicablein various shapes and in di'erent proportionsand sizes. to meet the various requirements of different structures tovWhichit may be applied.

In this invention-provision is made for compressing or squeezing a longpacking equally from both ends and from .all sides throughout itslength, so-that.' the packing will aline the body that is 4packed andhold it in true alinement with the ends of the stuffing. box.

The accompanying drawings illustrate the invention in' some of the formsin which it may 'b e applied for packing cylindricalA bodies.

Figure l is an axial section of a stuiiing box embodying'this 4inventionand applied in cylindrical form as-it might be arranged for the cylinderof an engine or a pump; and.

for the purpose of illustration, the inclosing case shown may -beregarded either as a j fragment of pump casingor of the cylinder of asteam or gas engine; and the inclosed body may be regarded -as occupyingthe-. place of the pistonof 'an engine or pump,- 55 or as the piston rodof anengine or as a propracticalli peller shaft, or as' the polishingrod of a pump. The parts are adjusted as applied for packing thevertical piston rod of a pump, and fragments of pump. 1

shown above and below the pac ng. Fig. 2 1s areduced plan section fromthe top o'f tubing are' Fig.- 1'. Fig. 3 isa reduced plan section on theirregular plane indicated at Fig. 1, showing-the upper ends of the dogmembers intact. Fig. 4 is a view of the lower. end of the upper sectionof the packing sleeve shown in Fig. 1. Fig. 5 is a side elevation of themiddle packing section shown in Fig. l viewed from the slit side. Fig. 6is a View analogous to Fig. 5 showing the outer packing ring that isnext to the case in Fig. l. Fig. 7 is a side elevation of thecompressible packing cage shown in Fig. l assembled as in use anddetached. Fig. 8 is aside eleva'- tion in the scale ofvFig.' 1 showingthe dogs for one of the wed ing members. Fig. 9 is an. elevation in reuced scale yof the inside face of one of the dogs shown in Fig. '8. Fig.l0is'a longitudinalsection of astullng box embodying the invention in asimpler form 'than that shown in Fig.` 1, andmapplied to the polishingrod of 'an' oilvpum'p.

Fig. .11 is a. side elevation of the simple compressible packing cageshown in Fig. 10. F ig. 12 is a reduced plan from the top of Fig. 10.Fig. 1 3- is a fragmental section on line w13, Fig. 10.

vReferring to the form shown in Fig. 1,

the body l to be packed is surrounded by a packing sleeve which is shownin three sections, the upper end section having a main body 2 and thelower end section `having a main body 3 and said end.'s'ecti`ons beingpractically duplicates. Between the main bodies of the end 4sections isheld a middle section 4. All of said sections are; spirally split on'one side in such a. manner as to allow' the .sections to be separatelyspread open and applied to the body 1J from any side thereof, so `thateach ysection' when conn pressed as hereinafterv described, forms aimpermeable' barrier to the fluid to be pac ed against. In the,` endacking sections-2 and 3, which are of considerable length, the spilt 5'is tangential 4and the spiral joint faces atthesplit 5 extend inAlongitudinal traces parallel with the axis of the packin while in themiddle packing section 4, t e spiral 'joint-'faces at the split 6 are'ina plane that is'aslant relative to the axis ofthe packing. Said packingmay be` lining 9. Said lining and apron are tapered down toward .theouter end of the packing; and all arespirally split as indicated at '5in Fig.Y 4;; the spiral split in said figures extending through the mainbody 2,' the band 7, the lining 9 andthe apron 8. The central' orifice10 ofthe packing is preferablyiof the same diameter as the body 1- andthe purpose of the longitudinal spiral joints at 5 and 6 is to allow thepacking Sections to bev compressed without wrinkling and .to preventleakage. Outside of the packing sections shown at 2,-3 ande and insidethe aprons 8 a reverse'lytaperedl contractible packing-compressing cage11 .is applied. Said cage is preferably formed of metal andconstructed-of corresponding sections which are inter-locked in zigzagrelation with eachl other to 'preventrelative longitudinaldisplacementaiad to allow movementA toward and from the axis of't-hepacking. Applied to the opposite ends ofthe4 packing and to the oppositetapers of the compressing cage,

are two wedgi'ng members in the formof conical boxes 12, each havingbearing sleeves 13`in slidable relation to the body 1, the

packing and the compressing cage. Preferably the wedging members 12 areprovided,

with frusto-conical chambers or cups 14 fitting the outside of thepacking and com'- pressing cage, so that when saidwedging members aremovedttoward each other they body, and the packing sections may beap-ypress endwise on the packing, and inward on the members of the cage,thus compress'- in'g the packing in all directions against the body l.The packing sections are placed in the box with their joints at 5 and 6in staggered relationto' each other and zit-variant'- anles so astop-,increase .the'security against lea age. The middle packing sectionis com- .pressible independently of the end packing sections and -itsjoint is closable by pressure both transversely and longitudinally. ofthe packingzand thejoints of the end packing sections are closable'.byinwardly directed .pressure 'at right angles to the axis of the packingsleeve. By this construction maxi-` mum security against' leakage alongand through the packing is, obtained with minimum compression ofthepacking, and consequently minimum friction on the packed plied to andremoved from such body without sliding them over the end thereof.Suit-r4 'a beveled ring 29 the beveled able means which may be automaticor otherwise are provided for relatively moving the elements that effectthe compression. A case lis applied outside of the wedging members 12 asshown in Fig. 1, and forms a chamber around the packing sleeve betweenthe wedging members., Said case may be of any form t-o carry out thepurpose of the constructor and may be the cylinder of a steam or gasengine or agsectionof pump .tubing or mayl be any other inclosing memberto encircle a piston or A'a piston rod or other body to be packed and.may form a chamber of any character to hold lubricant or other coolingmedi-um.

In. Fig. 41 said.

case is internally threaded at its ends, and

heads orv followers 1G, 17, are screwed into its bore for the purposeof' adjusting .the wedging members 12 toward each other. The forceexerted by the followers may be supported or transmitted in various waysas by a tension spring 18 which is mounted on the follower 17 and bearsagainst ajmetal washer. 19 which in turn bears against an outer packingring 20 of hemp or othel-fsuitable Amaterial which engages a shoulder 21of the wedging member 12to move such member. There is also shownin Fig.1' a dog 22- providedwith detents 23 to engage notches 24inside the casel5, and also provided with springs 22" that contact the4 wedging members12 and hold the dog in" position. Said dog is formed in two segmentalpieces shownin Figil 8,2s`aid pieces I- iojo being somewhat less thansemi-circular and each provided with a cavity'25 and with a recess-26 toaccommodate the cup and the bearing sleeve df the wedg'ing member. Eachof the followers 16, 17, is provided with a locking shoulder 27 whichmay be engaged by the ends of pump tubing sections 28 when the sameare-screwed home in the case, thus -to lock the followers -in place andfix them as stationary heads. vThe dov-22 engages face of which slopesfrom the wedging 'member 154 `which is there provided with `the notches24 into which the detents 23 of the dog engage thus to retain the'wedging member. The beveled rin@ 29 wedges against a'noutercompressible packing-ring 30 to pack the notches 24 and prevent leakagefrom or to the annular space between the wedging members. The wedg-' ingmembers 12 are externally stepped at 31 and 32 to receive the pressureof the dog 22, the bevel metal ring 30 and the packing ring 32, and'thereby applies force to .move the wedging member toward the thickermiddle portion of thecompressing jacket,

thereby -to contract said jacket. When it isl desired to doso thebeveled ring 29 and the packing ring y32 may be dispensed with and thedog 22 applied4 directly to move the wedging member or the dog alsomaybe dispensed with andthe follower 1G screwed directly onto thewedging member. When a dog is to Vbe employed in'the packing for a pumpit will be made of such gravity as may .be'required ineach case to eiectthe desired compression of the packing without excessive friction uponthe vpumprod` The followers may be provided with wrench seats 33 toreceive a Spanner wrench or otherjdevice by which the followers may bescrewed home.`

In the form of cage shown in Figs. 1 and 7, va number of bars or slats34 are joined together in zigzag relation to form a hollow vslitted bodythat is internally cylindrical;

each of said slats being externally ,tapered from the middle to the endsand provided at reverse sides and ends with a seat'v35 and a tongue 36;said seat and tongue being complementary and correspondingly circular sot and the wedging members to accommodate" that the'tongue of oneslat'and the seat -of the adjacent slat pivotally interlock to formhinges alternately at 'the ends of the cage, so that either .end of thecage may be contracted' or expanded independently ot the other end. A sthecage expands it shortens and as it contracts`- it lengthens. .Theends of the cage are inserted in the spacesbetween the bands. andlinings; the slats being ex-v ternally shouldered at 341 thus to form acavity betweenthe taper tips of the slats the aprons 8. and theirlinings 9. When the cage lengthens and contracts it presses end [wise onthe packing'at the tips and also inward on the packing. along the mainbodies andY also outward on the aprons and the thrust is withstood bythe wedging members and the body 1.

In the form shown in Figs. 10, 11, 12 and -13'the hollow wedging AInembers 37 and 38 screw together to inclose the packing, and haveconical cavities `inside to engage the reversely tapered `packingcompressing cage which in this form, as illustrated in Fig. 11, consistsof two corresponding semi-circular metal segments 11. each provided withstaggered slats 34" 'and with `seats and tongues 35?, A355.', 36', 36".tohold the segments againstl longitudinal displacement, thus lto renderthe cage compressible toward the axis after the manner of the cage shownin Fig. 7 The wedging membersy 37, 38, when screwed 'together formasubstitute for the case 15 Wherever it isdesired'to circulate a coolingmedium around the packing this may -be accomplished by providing thecase with a passage as at=39 and 40 to allow the medium to enter andescape from thecooling chamber 41 -inside the. case.. In Fig. 1 thepipes 39 .and 40 form the inlet and outlet from such cooling chamber.

Tlie packing may or may not be perfolrated thus forming passages toallow a 'medium..to flow; from ortowardthe body that is packed. In Fig.10 a number of such passages 41 is shown.

The wedging members 37, 38, may be rprovided with wrench seats 42 and43, so that they may be readilyturned.

- In practice the stuiling'box lparts may be assembled originally bysliding onto the body .to be packed the various elementsv which are tosurround the same; said elements being put in the relative -positionsshown in Fig. 1. All the parts to .surround the body 1 may be assembledindependently of said body 1 and the body 1 may then be slipped into thestuing box. 'Ihen assuming that the tube sections 28 have not beenapplied the `followers or either-of them may be adjusted, thus bringing.the wedging members sufficiently-close together to eect the desiredcompression, then the tube sections 28 may be screwed into place,thereby locking the followers; in fixedl relation to each other and theother parts.

If at any time, the packing-becomes worn a tube ,section 28 may beunscrewed and the follower thus made available may be screwed in totighten 'the,packing. As the dog is moved along for this purpose it willspring back as the detents pass the notches and vthe springs 22' returnthe detents into the notches. In the case of a vertical stufling box theweight of the dog 22 may be sutlicient to lforce the wedging membersdown to take up the'wear.-

-To remove the packing the tubing and ne of the followers may beunscrewed, thus allowing the case to' beslipped voli? of the activeparts of the stuling box. Whereupon the `wedging. members'-may be slidapart, thus giving access't'o the cage and then the vsections of thecage may be separated and the sections of the packing..sleeve may bewithdrawn laterally and replaced with new. In the form shownin Figs.10.and 13 v'it is suiiicientI to simply unscrew the Wedging members fromeach other, thus giving access to the internal parts. 4 4 shown in Figs.A10 and 13 isunitary and is provided with a slit 5V k,corresponding tothe slit 5 of Fig. l. Theshoulderse rat the ends are devoid ofth'efaprons shownin Fig. l-and contact with the?- conical cups oi thewedging members42, 43, .thus-.tobe lsqueezed endwise radially as thewedging members are screwed home upon the contractible cage 11.

' The spaces between the slats or bars' of the cagein either ofthe formsshown constitute channels in which the cooling medium or lubricant maycirculate to cool Vand lubrilcate the packing.

I claim .v .'1. The combination with a body to be packed, of .acompressible packing sleeve around said body'; said packing sleeve beingtapered toward its ends and provided be- The packing sleeve yllO .gether y :'the tapered ends thereof, 'and means in the to be packed.

tween the ,taperedi-portions with arecess, wedging members adapted '.tobe screwed toto inclose the packingl and to .engage recess to hold thepacking toward the body 2. The combination withA a body to be packed, ofa split packing sleeve around said body; said sleeve' being providedwith shoulders at` its ends, wedging members around the sleevecontacting withfthe .shoulders of the sleeve, and/means between theshoulders to compress the sleeve. l

3. The combination' with a body to be' ,packed of a split 'packingsleeve around said body, said sleeve being provided with shoulders atits ends, bars arranged in zigz 4' zag. relation: between the shoul/dersand each 4other around the'sleeve and between .the shoulders and betweenthe the sleeve. Y. I

4. The combination with a; body to be,

around the sleeve, wedging members contacting with the sleeve and .withthev bars and means .to move the barsand compress packed of a spirallysplit packing sleeve provided with shoulders and aprons at its ends,bars arranged in'staggered relation' to aprons and thebody ofthe sleeve,and means for wedg ing-the sleeve, apron and bars tov compress V'thesleeve.

5. The combination with a body to be' packedl of a compressible packingsleeve r bars arranged in staggered relation to each.

around said body, said sleeve being provided at its ends vwith shouldersand with aprons,

other around the sleeve between the shoul- V body of the sleeve andmeans for ders and between the apronsan'd the main thesleeve, apron andvbars to compress the sleeve endwise and. laterally. l

.6. The' combination with abody to be packed'of acompressiblesleeveprovided at its ends with shoulders and aprons, bands around the ends ofthe sleeve inside the aprons, linings inside 'the aprons, bars'ar rangedin staggered relation between the aprons, and yhollow wedging members towedge the aprons and the bars to compress the sleeve.

7. In a stuffing box the combination with a packingsleeve of hollowwedging members around the ends ofthe sleeve, a case around the wedglngmembers and means in side the case .for 'relatively moving the' wedgingmembers to compress the sleeve.

8. In a stufling box the-combination with a packing sleeve,`of barsarranged in stag-4 gered vrelation around. the packing-sleeve, hollowwedging members around the ends of the sleeve and bars, a case aroundthe wedging `members, slee-ve and bars, and means inside the case torelatively move the wedging members to compress the bars and wedgmg.

compress tractible and rprovided with c means to sup 9. Thecombinatiemwith a body to `-be 'l packed of a compressible vpackingsleeve around said body, a cage composed of bars in staggered relationto eachother around the sleeve, hollow wedging members around the endsofthesleeve and cage, said wedging members having` external shoulders, acase around the wedging members, said case being externallyscrew-threaded at its ends -and provided with notches, packing ringsaround the wedging membersand against the 'shoulders thereof, ringsaround the wedgingmembers and against the packing rings, a springagainst one of said rings, a dog 'having detents to engage the notchesand arranged against the other of said rings, said dog being formed-inparts, and followersxscrewed intolthe case against \the' spring and thedog.

io.` The combinati@ with` Aebony tobe Ypacked of a compressible packing'sleeve around said body, a cage composed of bars in staggered relationto each otherl around the sleeve, hollow wedging members around the endsofthe sleeve and cage, said wedging members having externa shoulders, a

V case around the wedgi-ng members, said case beingexternallyscrew-threaded at its ends the shoulders thereof, rings around the wedg-.and provided with notches, packing rings around the wedging members andagainst ing members andagainst the packing rings, i

a spring against one of said rings, a dog haying 1 arranged against theother of said rings, said dog being. formed in parts, followers screwedinto the case against the spring and the dog, and-,means screwednintothe case to lock` the followers.

f ll. The packing sleeve provided at itsl ends with shoulders'extendingaround vthe sleeve, a contractible cage' between the shoulders, andmeans inclosing th'epacking shoulders to compress the'same" and `withtheA'cage to contract the cage and thereby to shoulders. I

12. The combinationwith a case and a `bodyinside the case, of a pack-ingsleeve arranged outside the body having shoulders at its `ends andrecessed to'form a chamber between its ends and provided on saidshoulders with frustoconicalaprons, metallic lining inside the aprons,metallic bands around theends offthe packing sleeve, a cage in thechamberg-said cave being conhannels for a lubricating or "cooling mediumfollowers between the `ends of the packing' and the caseto Contact with'the packingand. theV cage., and to compress the packing, and

medium to the chamber.

13A4 vstuiiing box' comprising. spirally' detents to engage the notchesand' the packing intermediate the-l sleeve. and cage and contactingwith*v the ply a -lubricating or copfling split packing and means tocompress the sleeve packing from all sides toward the center to alinethe' packed body with the ends of the stuifing box.

14C. A vstuffing box comprising a packingl sleeve and means to compressthe packing from all sides toward the center to aline the packed bodywith the ends of the stuffing box; hand means to .form a` chamber aroundthe packing practically throughout the length of the packing to containa cooling or lubricating medium.

15. In a stufiing box-a packing compress ing cage composed of barslongitudinally spaced apart and pivotally connected at their ends so asto be relatively movable toward andfrom each other.

16. The combination of bars arranged in zigzag relation .and provided attheir reverse sides and ends with seats and tongues pivotallyinterlocked substantially and for the purpose set forth. f w

17. In a stuffing box the combination with packing, of bars arranged inzigzag relation and provided at their reverse sides and ends with seatsand tongues pivotally interv locked and' means to move the bars to comlpress the packing` 18. A packing cage composed of slats hinged togetheralternately at the ends of the cage."

19. A packing cage composed of slats provided on their reverse sides andends with seats and tongues and thereby alternately hinged at oppositeends of the cage so that the ends of the cage are independentlycontractible. ,l 1

20. A packing externally recessed between its ends, a contractible cagein the recess and means to contract the cage.

21. In 'a stuliing box 'movable means to compress the packing and adogto hold said' means to .tighten the packing,y

22. In a'stuihng box a case around .the packing and' provided insidewith notches, means inside the case to compressthe packing, and adogformed in parts and'provided with detentsrto engage the notches `totighten the packing.

23. The packing sleeve'provided with an' apron at 4its end and vmeansoutside and within-the apron to compress the sleeve.

29th day of October, 1910. 1

,241. A stuiiing boxA comprising a case;

compressible packing arranged inside the 'case andl provided with apronsat its ends; and

4contractible means around the packin inside the aprons to compressthe-pac ring; boxes to compress the aprons and the contractible means;means to adjustone of the boxes, in the case and resilient means tosupport the thrust of the other box.

25. The combination with a case 'lof a spring,

sleeve,packing inside the wedging member, contractible means arrangedvwith one end inside the wedging means inside the wed ing member, packinginside the contractib e means, wedging means laround the other end ofthe contractible. means tocontract the same, and means toadjust thelastnained wedging means. l

l26. The combination with packingof Vcontractiblemeans arrangedaround-and adapted to compress the packing, wedging means to contracttheycontractible means, va case around the wedging means, akpacking-ring between `the Wedging means andthe case, a

beveled ring on the packing ring, a dog to engage the beveled ringto'inove the packing and the Wedging means, and, means vto hold the dogin adjustable position.

rin

27. 'I-he combination With packing of lcontractible means arrangedaround and adapted to compress the packing, wedging means. to contractthe contractible means, a vcase around 4the w-edging means, a packing'ring between thewedging means and the' case, al

beveled `ring on the packing ring, a dog to engage the beveled ring tomove the packing ring and the wedging means, means to hold the dog inadjustable position, and a spring vfastened to the dog and adapted toContact. l

with thewedging member. In testimony whereofl set my hand at LosAngeles, California, this v. JOHN HAHN. In presence of- JAMES R.TowNsEND, OLIVE 'DEFENDERFER means to support the s ring, a washer onthe spring, apacking s eeveonv the washer, a wedging member inside ltheWasher and packing sleeve, a shoulder to receive the thrust of saidwasher yand packing I have hereunto

